EP1156912A1 - Gattersäge mit programmgesteuertem schnittgutvorschubförderer - Google Patents
Gattersäge mit programmgesteuertem schnittgutvorschubfördererInfo
- Publication number
- EP1156912A1 EP1156912A1 EP00907336A EP00907336A EP1156912A1 EP 1156912 A1 EP1156912 A1 EP 1156912A1 EP 00907336 A EP00907336 A EP 00907336A EP 00907336 A EP00907336 A EP 00907336A EP 1156912 A1 EP1156912 A1 EP 1156912A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- saw
- frame
- control device
- crank drive
- feed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B3/00—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks
- B27B3/02—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks with vertically-reciprocating saw frame
- B27B3/18—Controlling equipment, e.g. for controlling the drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B3/00—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks
- B27B3/02—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks with vertically-reciprocating saw frame
- B27B3/16—Driving mechanisms for the feed rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B3/00—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks
- B27B3/02—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks with vertically-reciprocating saw frame
- B27B3/20—Equipment for guiding the sawn part of timber during machining, e.g. preventing faults due to torsional stress
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/444—Tool engages work during dwell of intermittent workfeed
- Y10T83/4501—Work feed means controlled by means mounted on tool or tool support
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/444—Tool engages work during dwell of intermittent workfeed
- Y10T83/4597—With means to control magnitude of work-feed increment or work acceleration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/647—With means to convey work relative to tool station
- Y10T83/6475—With means to regulate work-feed speed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/687—By tool reciprocable along elongated edge
- Y10T83/6905—With tool in-feed
- Y10T83/691—And auxiliary means for promoting or retarding tool in-feed
- Y10T83/6925—With interrelated tool actuating and in-feed means
Definitions
- the invention relates to a gang saw with a saw gate which can be driven via a push-crank drive, the parallel saw blades of which only cut in one stroke direction have an overhang, and with a feed conveyor for the clippings which is separated from the push-crank drive by means of at least one motor connected to a control device can be driven intermittently as a function of the cutting speed during the working stroke of the saw frame.
- the feed conveyor for the clippings In order to ensure constant chip thicknesses in gang saws with a saw gate driven via a sliding crank drive, whose saw blades cut only in one stroke direction, despite the sinusoidal speed profile over the working stroke, the feed conveyor for the clippings must be driven intermittently depending on the cutting speed.
- the feed drive for the feed conveyor derive from the push crank drive, for example via a ratchet drive, which connects the feed conveyor for the clippings to the push crank drive only during the working stroke.
- the invention is therefore based on the object of designing a frame saw of the type described at the outset in such a way that advantageous cutting conditions conditions can be guaranteed in order to ensure a long service life for the saw blades with comparatively high cutting performance.
- control device connected to a signal transmitter for a predetermined rotational position of the thrust crank drive controls the motor in dependence on the response of the signal transmitter in accordance with a stored control program which can be adapted to the respective stroke frequency of the push crank drive for a conveying step.
- the speed profile of the feed conveyor after overcoming the saw blade clearance must be adapted exactly to the profile of the cutting speed of the saw gate during a working stroke, provided that a feed drive that is independent of the push crank drive requires a sufficiently precise motor control.
- each angle of rotation of the thrust crank drive is assigned an angle of rotation for the motor of the feed drive, but rather that the motor is stored according to a control device Control program for a conveying step is controlled, so that it is only necessary for the control device to be clocked by the push-crank drive in order to carry out such a conveying step of the feed conveyor.
- a signal transmitter for a given rotational position of the thrust crank drive is to be provided.
- the signal transmitter consists of a transmitter for the dead center position of the push crank drive at the end of the working stroke, because in this case the signal transmitter is in a simple manner the saw frame guide can be assigned without having to provide complex adjustment options.
- the dead center position at the end of a working stroke allows the feed drive to start with the following working stroke despite the advance required to overcome the saw blade clearance.
- control device can have memory for a control program which is dependent on the speed of the thrust crank drive and is independent thereof, which provides for a feed of clippings in accordance with the release of the saw blade caused by the overhang of the saw blades.
- This subdivision of the control program into a part that is dependent on the stroke frequency of the saw gate and is independent of it is particularly recommended if the control device is connected to an input for different control parameters, via which the feed is to be changed, for example, to adapt to different chip thicknesses.
- the feed drive has two motors which can be controlled separately via the control device and which are assigned to the feed conveyor in the feed direction in front of and behind the saw frame, the feed conveyor can be driven in front of and behind the saw frame at different speeds be what allows the application of tensile or compressive forces on the clippings in the cutting area.
- FIG. 1 shows a gang saw according to the invention in a schematic side view
- FIG. 2 shows the thrust crank drive for the saw gate and the feed drive for the clippings in a simplified block diagram
- FIG. 3 shows the time course of the stroke of the saw gate driven via the push crank drive
- FIG. 4 on the one hand shows the temporal speed profile of the saw gate and on the other hand the temporal course of the speed of the feed drive.
- the frame 1 of a gang saw has a lifting guide 2 for a saw frame 3, which can be driven back and forth with the aid of a sliding crank drive 4.
- the parallel saw blades 5 of the saw frame 3 are clamped in a conventional manner in a frame which is mounted in the saw frame 3 with an adjustable overhang.
- a feed conveyor 6 is provided which consists of driven conveyor rollers 7 arranged in front of and behind the saw frame 3, to which the clippings are pressed by means of pressure rollers 8, which can be set by actuating cylinders 9, in contrast to conventional feed conveyors 6, the conveyor rollers 7 are not driven by the thrust crank drive 4, but rather by separate motors 10, the drive connection according to FIG. 2 taking place via chain drives 11.
- control device 12 which according to FIG. 2 comprises a computing unit 13, via which setpoints are given to position controller 14 for the motors 10.
- the motors 10 are regulated according to the feed requirements by means of a setpoint / actual value comparison.
- the setpoint values are specified via control programs which are stored in program memories 15 and 16.
- the arrangement is such that the feed conveyor 6 executes a conveying step via the motors 10 when the control device 12 is activated via a signal generator 17 for the dead center position of the push crank drive 4 at the end of a working stroke.
- Fig. 3 shows the course 18 of the stroke h of the saw frame 3 over time t by an average stroke position h m between an upper dead center position h 0 and a lower dead center position h u , the working stroke in the cutting direction of the saw blades during the downward movement of the saw frame 3 from the top dead center position h 0 to the bottom dead center position h u .
- the saw frame 3 has a temporal speed profile corresponding to curve 19 in FIG. 4.
- the speed v above the time axis t corresponds to the cutting speed of the saw blades 5 during the working stroke.
- the feed conveyor 6 In order to ensure a uniform chip thickness over the working stroke, the feed conveyor 6 must be driven in phase with the saw gate 3.
- a corresponding feed speed v s for the feed conveyor 6 is shown in FIG. 4, which can also be seen that during the empty stroke of the saw frame 3, according to the speed curve 19, no cut material feed may take place below the time axis t.
- the necessary for the exemption of the saw blades 5 during the idle overhang of the saw blades 5 requires that the exemption of the saw blades 5 are overcome with respect to the bottom of the kerfs must be done before the saw blades 5 can be cut into the clippings.
- the feed conveyor 6 must be driven so that the clippings are cut to the saw blades 5 at the beginning of the working stroke.
- the clippings must be conveyed before the working stroke by a path corresponding to the release of the saw blades 5, which is predetermined according to the set overhang, so that the necessary clippings can be ensured via the feed drive at a corresponding speed profile v a .
- the timing of the motors 10 depends on the stroke frequency of the thrust crank drive.
- the speed profile v s must therefore be adapted to the respective stroke frequency, as is also necessary to adapt the lead time t v to the stroke frequency.
- the control program which is stored in the memory 16 and is dependent on the stroke frequency of the saw frame 3, is calculated with the respective stroke frequency in the arithmetic unit 13 in such a way that the corresponding setpoints can be specified to the position controller 14 as a function of the respective stroke frequencies.
- the stroke frequency itself is presented to the arithmetic unit 13 via an averager 20, so that any fluctuations can be compensated for.
- the parameters to be specified for this can be set via an input 21 of the control device 12. These parameters can be used, for example, to change the amplitudes of the speed profiles v s , as is indicated by dashed lines in FIG. 4. However, changes in the area of the overhang of the saw blades 5 can also be taken into account by means of corresponding parameters in order to adjust the speed profile v a accordingly.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT33399 | 1999-03-01 | ||
| AT0033399A AT406945B (de) | 1999-03-01 | 1999-03-01 | Gattersäge |
| PCT/AT2000/000052 WO2000051795A1 (de) | 1999-03-01 | 2000-02-28 | Gattersäge mit programmgesteuertem schnittgutvorschubförderer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1156912A1 true EP1156912A1 (de) | 2001-11-28 |
| EP1156912B1 EP1156912B1 (de) | 2007-05-30 |
Family
ID=3487817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00907336A Expired - Lifetime EP1156912B1 (de) | 1999-03-01 | 2000-02-28 | Gattersäge mit programmgesteuertem schnittgutvorschubförderer |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7032486B1 (de) |
| EP (1) | EP1156912B1 (de) |
| AT (1) | AT406945B (de) |
| CA (1) | CA2330670C (de) |
| CZ (1) | CZ295605B6 (de) |
| DE (1) | DE50014367D1 (de) |
| WO (1) | WO2000051795A1 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT501595B1 (de) * | 2005-04-29 | 2006-10-15 | Wintersteiger Ag | Verfahren zum steuern einer gattersäge |
| US20100269664A1 (en) * | 2009-04-22 | 2010-10-28 | Mike Majchrowski | Servo pouch knife assembly |
| MX2013010225A (es) | 2011-03-07 | 2014-01-08 | Infusion Brands Inc | Sierra reciprocante de doble cuchilla. |
| CN103769566A (zh) * | 2013-01-14 | 2014-05-07 | 翔德(福州)精密机械有限公司 | 活塞保温冒口自动锯床 |
| CN104597839B (zh) * | 2014-12-02 | 2017-08-08 | 苏州汇川技术有限公司 | 追剪裁切装置及获取运行曲线的系统、方法 |
| CN112058419B (zh) * | 2020-09-17 | 2022-03-18 | 江苏东南植保有限公司 | 用于农药加工生产输送切割机构 |
| CN112719456A (zh) * | 2020-12-27 | 2021-04-30 | 边涛 | 一种建筑工程施工用板材高效自动化切割装置 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2817375A (en) * | 1949-07-05 | 1957-12-24 | Traben Josef | Drive for the feed rollers of frame saws |
| DE2243426A1 (de) * | 1971-09-06 | 1973-03-15 | Johan Krister Karlstroem | Verfahren zum regeln des betriebs einer rahmensaege, bandsaege oder anderen saegemaschine mit blattfoermigem oder bandfoermigem saegewerkzeug sowie vorrichtung zur durchfuehrung des verfahrens |
| SU419375A1 (ru) * | 1972-03-31 | 1974-03-15 | Устройство для регулирования скорости подачи бревен в лесопильных рамах | |
| USRE28077E (en) * | 1973-01-15 | 1974-07-16 | Automatic heat cutting machine | |
| JPS51148886A (en) * | 1975-06-06 | 1976-12-21 | Keuro Maschinenbau Gmbh | Backksaw |
| US4357848A (en) * | 1979-05-30 | 1982-11-09 | Amada Company, Limited | Method and apparatus for controlling the feeding of a bandsaw blade of horizontal bandsaw machines |
| US4308852A (en) * | 1979-06-23 | 1982-01-05 | Siegfried Gebhart | Apparatus for sawing different materials |
| SU852540A1 (ru) * | 1980-01-15 | 1981-08-07 | Головное Конструкторское Бюро Дерево-Обрабатывающего Оборудования | Электрогидравлический привод подачидЕРЕВООбРАбАТыВАющЕгО CTAHKA |
| JPS59163608A (ja) * | 1983-03-08 | 1984-09-14 | Hitachi Koki Co Ltd | ジグソ− |
| SE453169B (sv) * | 1983-04-19 | 1988-01-18 | Wallers John Mek Verk | Ventil for att styra driften av ramsagar med hydraulmotordrivna matarverk |
| SU1166991A1 (ru) * | 1984-01-30 | 1985-07-15 | Новозыбковское специальное конструкторское бюро деревообрабатывающих станков | Электрогидравлический привод подачи деревообрабатывающего станка |
| US4644832A (en) * | 1985-03-21 | 1987-02-24 | Smith H Reid | Method for monitoring saw blade stability and controlling work feed rate on circular saw and bandsaw machines |
| SU1303407A1 (ru) * | 1985-03-29 | 1987-04-15 | Карельский научно-исследовательский институт лесной промышленности | Устройство дл определени фактической посылки лесопильной рамы |
| US4707793A (en) * | 1985-09-30 | 1987-11-17 | The Boeing Company | Method of determining feed rate and cutting speed for cutting metal and of predicting cutting effects |
| FI885119L (fi) * | 1988-11-07 | 1990-05-08 | Vuolle Apiala Antti | Matningsanordning. |
| RU2096169C1 (ru) * | 1992-10-27 | 1997-11-20 | Валентин Нилович Дерягин | Гидравлический привод пульсаторной подачи лесопильной рамы |
| US6089135A (en) * | 1994-09-20 | 2000-07-18 | Murray; Robert J. | Method and apparatus for bucksawing logs |
-
1999
- 1999-03-01 AT AT0033399A patent/AT406945B/de not_active IP Right Cessation
-
2000
- 2000-02-28 WO PCT/AT2000/000052 patent/WO2000051795A1/de not_active Ceased
- 2000-02-28 DE DE50014367T patent/DE50014367D1/de not_active Expired - Lifetime
- 2000-02-28 CZ CZ20004337A patent/CZ295605B6/cs not_active IP Right Cessation
- 2000-02-28 US US09/674,205 patent/US7032486B1/en not_active Expired - Fee Related
- 2000-02-28 CA CA002330670A patent/CA2330670C/en not_active Expired - Fee Related
- 2000-02-28 EP EP00907336A patent/EP1156912B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0051795A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000051795A1 (de) | 2000-09-08 |
| DE50014367D1 (de) | 2007-07-12 |
| EP1156912B1 (de) | 2007-05-30 |
| CZ20004337A3 (cs) | 2001-07-11 |
| CZ295605B6 (cs) | 2005-08-17 |
| CA2330670A1 (en) | 2000-09-08 |
| AT406945B (de) | 2000-10-25 |
| US7032486B1 (en) | 2006-04-25 |
| CA2330670C (en) | 2008-04-15 |
| ATA33399A (de) | 2000-03-15 |
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